As Brant mentioned in the other thread it can make the handling a bit off due to the increase in height of the bb, the C456 it's that low to start with either I think.
My 26/650/29 conversion has a custom length shock and fork to cater for the extra height and get the bb down to a reasonable height.
May not be an issue given it's intended use and options with fork but worth bearing in mind all the same.